Well that clears that up Gumpy I am not a MCI person although I have owned 2 and don't work on that bus those guys did some weird stuff,my 8 would not start till the fuel pressure came up hot or cold

good luck

Cliff,

If I understand you, you are saying that your bus would start but would not stay running until fuel pressure came up. If you let up on the start button too soon, it would die. Is that correct? This is normal, and is actually not related to the fuel pressure, but is in fact caused by the low oil pressure switch activating the safety shutdown before oil pressure comes up. By holding the start button in until the oil pressure comes up (i.e. the dash light goes out), you are effectively overriding the safety shutdown system until the oil pressure sensor says it's all good.

That tells me your safety system was functioning properly (at least for the override and oil pressure switch). Doesn't say anything about the fuel switch, unless you are sure it wasn't grindingaway at the starter while you waited for the oil pressure to come up. Those fuel switches are notorious for malfunctioning. In fact, I have a new one in the bus that I need to install when I get to warm weather next week.

Those fuel switches are notorious for malfunctioning. In fact, I have a new one in the bus that I need to install when I get to warm weather next week.craig

When I first bought my coach it was bypassed by grounding it to an engine bolt.

I replaced it and had to do the same a few years later.

Always good to know how to bypass a sensor failure, of course you better be darn sure its a sensor failure......

Cliff

Yep, there's a permanent alligator clip hanging next to mine for the same reason. I've put 3 or 4 on since I've owned the coach. The last one broke and started leaking fuel all over the place.

You cannot ground the the other sensors (low water, low oil pressure, hot engine). Those sensors are normally open and close to ground when they activate, which completes the safety shutdown circuit. But you can remove the wire and wrap it with electrical tape to keep it from grounding against the engine block. That will get you home.

There is a school of thought that would suggest disconnecting an auto shut down feature on a coach that the driver is also the bill payer.

Auto shut down was to protect the investment in equipment from hired drivers, who did not share the desire for economical operation... I know many, before, now and future, who would just keep driving it until it stopped moving, regardless of what was lit or ringing.

There is a school of thought that would suggest disconnecting an auto shut down feature on a coach that the driver is also the bill payer.

Auto shut down was to protect the investment in equipment from hired drivers, who did not share the desire for economical operation... I know many, before, now and future, who would just keep driving it until it stopped moving, regardless of what was lit or ringing.your coach, your choice!happy coaching!buswarrior

BW you are so correct in all of this (especially the part about hired drivers that will keep going as long as it will regardless if it breaks in half! As long as the 1/2 they are in is still moving it's all still good right?)

Now on the part I made bold. Please take note of my of our very own bus guru's post! I make note of this not to point fingers at, demean, or insult Craig in any way, but to bring light that as he is not only a talented & knowledgeable bus guru but a personal friend as well! But rather to point out that we all regardless how much $ or time we've spent on these buses can get "comfy" and forget to pay as much attn as we should!

"I feel stupid about missing this plug, even after explaining it to my friend who was helping me, but the reality of it is, this stuff can happen no matter how careful we are. This is one prime example of why the safety shutdown system on these buses should be in proper working order. When my compressor failed, it became obvious that I was not paying as close attention to my gauges as I thought I was. If I had not been paying close attention to them this time, and the safety shutdown system was not functioning, I could very easily have lost my engine.

See, I am not good for nothing. I can be used as an example.

Learn from my mistakes."

craig

Craig thank you for the complete & honest eye opener! This is not to make you look or feel bad, but in both our own words AN EXAMPLE! (and not a bad one either! ) BK

On my bus the auto shut down and the alarms were both disabled. The first thing I did when i got the bus was to re-establish the low air audible alarm buzzer, but I haven't done anything with the other alarms (other than buy new diodes so I could fix it all up). I think a good compromise is to disable the auto shut down, but make very sure the audible alarm buzzer is hooked up and working for low air, low oil pressure and high water temperature, along with their respective warning dash lights.